AI Usage Timeline
Privacy Policy
Last updated: 27 July 2026
The short version. The extension stores everything it measures on your own computer. It has no server, no account, no analytics and no third-party services. No data is ever transmitted to the developer or to anyone else.
What the extension reads
While you are signed in to the services in the same Chrome profile, the extension periodically requests the same internal usage endpoints that the web apps themselves use:
https://claude.ai— your organization id and your usage-limit utilization (5-hour window, weekly window, and the per-model weekly window when present).https://chatgpt.com— your account id and your Codex usage-limit utilization (5-hour window and weekly window when present).
From those responses it keeps only two kinds of numbers: a percentage (0–100) of the limit consumed, and the timestamp at which that limit resets.
The extension does not read, store or transmit your conversations, prompts, completions, files, API keys, passwords, or the contents of any other website.
What is stored, and where
All measurements and settings are written to chrome.storage.local, which lives in
your Chrome profile on your device. Measurements older than 90 days are deleted
automatically.
Nothing is uploaded. The only network requests the extension makes are to
claude.ai and chatgpt.com, authenticated with the session cookies
already present in your browser — exactly as if you had opened those pages yourself.
If a background request cannot use your session, the extension briefly opens an inactive tab on the provider's own site, reads the same usage JSON there, and closes the tab again.
Permissions and why they are needed
| Permission | Why |
|---|---|
alarms | Schedule the periodic measurement (every 5–60 minutes, your choice). |
storage | Keep the measurement history and your settings locally. |
tabs | Open and close the temporary fallback tab described above. |
scripting | Run the usage request inside that fallback tab. |
claude.ai, chatgpt.com host access | Read the usage endpoints of those two services. |
Your control over the data
- Export CSV on the settings page writes the full history to a file you choose.
- Clear history on the settings page deletes every stored measurement immediately.
- Disabling either service stops all requests to it.
- Uninstalling the extension removes all stored data with the Chrome profile data.
Data sharing and sale
The developer does not collect, receive, sell, rent or share any user data. There is nothing to share — the data never leaves your machine.
Changes to this policy
Any change will be published on this page with a new “Last updated” date.
Contact
Questions or reports: andris@strt.hu, or open an issue on GitHub.